Usually in FS22, rain only affects the harvest time.

Now that's not the case.

Cultivators, seeders, weeding machines, plows and much more will slow down and be damaged in rainy or frosty weather. Plows and cultivators suffer the most from poor soil conditions; seeders and mowers to a lesser extent.

Bad weather also affects how well certain tools like balers and liquid sprayers work, and your harvest will be smaller if you wait until the ground is completely dry, which takes as many game hours as you have days in a month.